Home / 29.33-40.45-21.12

Finding the Fourth Proportional to 29.33, 40.45 and 21.12

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Solution

The fourth proportional to 29.33, 40.45 and 21.12 is: 29.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    29.33 : 40.45 = 21.12 : x
  2. Step 2: Convert to fraction form
    29.33/40.45 = 21.12/x
  3. Step 3: Cross multiply
    29.33x = 40.45 × 21.12
  4. Step 4: Simplify right side
    29.33x = 854.30
  5. Step 5: Solve for x
    x = 854.30/29.33
  6. Step 6: Final answer
    x = 29.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.